Earth moving apparatus or the like



Nov. 19, 1957 J. 5. PILCH EARTH-MOVING APPARATUS on THE LIKE 5 Sheets-Sheet 1 Filed Jan. 14', 1957 JOHN s. PlLcH ATTOPNCX Nov. 19, 1957 J. s. PILCH 2,813,645

EARTH MOVING APPARATUS OR THE LIKE Filed Jan. 14, 1957 5 Sheets-Sheet 2 INVENTOR. JOHN S."PH Cl-1 AT OPNEY Nov. 19, 1957 J. 5. PILCH 2,813,645

EARTH MOVING APPARATUS OR THE LIKE Filed Jan. 14, 1957 5 Sheets-Sheet 3 INVENTOR. JOHN 6. PILCH.

Nov. 19, 1957 .1. s. PILCH 2,813,645

EARTH MOVING APPARATUS OR THE LIKE Filed Jan. 14, 1957 5 Sheets-Sheet 4 INVENTORQ JOHN S. 'P'ILCH TTOPA/EY Nov. 19, 1957 5,

EARTH 'MQVING APPARATUS OR THE LIKE 5 SheetsPSheet 5 Filed Jan. 14, 1957 I -INVENTOR. JOHN s. PILCH' BY W ATTOPNEY I United States Patent D EARTH MOVING APPARATUS OR THE LIKE John S. Pilch, Ware, Mass.

Application January 14, 1957, Serial No. 633,925

7 Claims. (Cl. 214138) This invention relates to earth moving apparatus or the like and has particular reference to a new and improved bucket control or actuating arrangement for use in a tractor mounted trencher or backhoe such as set forth in my application, Serial No. 127,170.

This application is a continuation in part of my application, Serial No. 401,892, filed January 4, 1954, now abandoned, which was a division of my application, Serial No. 185,841, filed September 20, 1950, now Patent 2,718,312.

An object of the invention is to provide a new and improved bucket actuating or control arrangement for a device of the type set forth, which provides a greater degree of bucket rotation for filling and dumping, thereby increasing the efficiency of the apparatus and speeding up its operation.

Another object is to provide an apparatus of the type set forth which allows the use of shorter hydraulic cylinders and rams, thereby reducing the cost of the apparatus while providing greater operating efficiency.

Another object is to provide a device of the type set forth wherein the utilization of a relatively short hydraulic cylinder and ram is employed with a linkage mechanism, whereby a multiplying motion or action is obtained and resulting in a greater degree of bucket rotation while employing a simplified and more economical construction.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings, as the preferred forms have been given by way of illustration only.

Referring to the drawings:

Fig. 1 is a side view illustrating an arrangement constructed according to the invention;

Fig. 2 is a further side view of the apparatus of Fig. l but showing the bucket in retracted position;

Fig. 3 is a side view of a slightly modified form of the invention;

Fig. 4 is a side view of the apparatus of Fig. 3 but illustrating the operation thereof;

Fig. 5 is another side view of the apparatus of Figs. 3 and 4 and further illustrating its operation; and

Figs. 6 and 7 are side views of another slightly modified form of the invention and illustrating its operation.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout, the invention shown comprises a dipper stick 10 adapted to be pivotally connected at 11 to a boom 12.

The dipper stick 10 is adapted to be pivoted relative to the boom by means of hydraulic cylinder and ram means of which only the ram 13 is shown, and which is pivotally connected at 14 to dipper stick 10 adjacent one end thereof.

The bucket 15 having the digging edge 16 is pivotally connected to dipper stick 10 adjacent the end thereof opposite the connection of ram 13, and bucket 15 is pivotally connected to dipper stick 10 by pivotal connection 17 adjacent the open end 18 of the bucket, which is also provided with the closed end 19.

Patented Nov. 19, 1957 Spaced from the pivot connection 17 is lug 20, secured to the outer surface or periphery of the bucket 15 and a link 21 is pivotally connected adjacent one end to lug .20 by pivot 22.

The lug 23 is provided on the dipper stick 10 and another link 24 is pivotally connected adjacent one end to lug 23 by pivot 25. Link 24 is provided with a series of pivots 26, to one of which is pivotally connected the free end of link 21.

As will be seen from the drawings, the link 24 is pref- ,erably pivotally connected adjacent one end to the dipper stick at a distance from the end of the dipper stick not greater than the length of either of the links and with this arrangement a greater degree of rotation of the bucket can be obtained.

Link 24 is also provided with a series of pivots 27, to one of which is pivotally connected the end of ram 28 which extends into double-acting cylinder 29, which is pivotally connected at 30 to dipper stick 10 adjacent the end thereof to which ram 13 is pivotally connected.

It will be seen that by employing the linkage that a relatively short cylinder and ram 29 and 28 may be employed, thus reducing the cost of the apparatus while at the same time increasing the range of movement of the bucket and, that because of the multiplying or scissor action of the linkage that the bucket may have its digging edge 16 retracted or withdrawn to a point beyond the plane of the dipper stick, as shown in Fig. 2 while, because of the linkage, the bucket may be rotated to have its open end 18 substantially normal or perpendicular -to theplane of the dipper stick, as shown in Fig. 5.

' The cylinder 29 is adapted to receive hydraulic pressure from a source on the tractor through the lines 31 and 32 for actuating ram 28 in cylinder 29.

The utilization of the links also allows the obtaining of higher speed and power of operation at a point near the end of the digging or filling of the bucket when such increased speed and power are advantageous.

In addition, the links allow the greater degree of rotation of the bucket without interference between the ram 28 and the end of dipper stick 10, as would occur upon rotation of the bucket if the links were not employed.

Furthermore, because of the linkage arrangement there is provided, in effect, a motion multiplying mechanism whereby small amounts of travel of the hydraulic means results in much greater amount of travel of the bucket, due to the motion multiplying eflfect of the linkage and thereby increasing the speed of travel or rotation of the bucket and speeding up the operation of the device.

In the arrangement of Figs. 3, 4 and 5, the lug 23 is shown on the side of the dipper stick and only a single pivot connection 27 is shown, which is positioned between the pivot connection 26 between the two links and the dipper stick.

It is pointed out that in any of the forms shown, the ram 28 could be pivotally connected directly to the pivotal connection of the two links.

In Figs. 6 and 7, the lug 23 is shown on the side of the dipper stick opposite ram 28 and cylinder 29 and, as will be noted from Fig. 7, this arrangement allows the bucket to be completely rotated into engagement with the dipper stick for carrying purposes, if desired.

From the foregoing, it will be seen that I have provided new and improved means for obtaining all of the objects and advantages of the invention.

I claim:

1. In a device of the character described, a dipper stick adapted to be pivotally connected to a boom, a bucket pivotally connected at its open end to said dipper stick at one end thereof, a first link pivotally connected adjacent one end to said bucket at a point spaced from the end of said dipper stick and a second link pivotally connected adjacent one end to said dipper stick at a distance from the end of said dipper stick not greater than the length of either of said first or second links, and pivoted adjacent its other end to said first link to form with said first link, dipper stick, and. bucket, a four bar linkage rocking mechanism for pivoting said bucket on said dipper stick, and hydraulic means connected to said linkage and to said dipper stick to. pivot the bucket on the dipper stick. i

2. In a device of the character described, a dipper stick adapted to be pivotally connected to a boom, a bucket pivotally connected adjacent its open end to said dipper stick at its lower end, a first link pivotally connected to said bucket adjacent the closed end thereof, a second link pivotally connected at one end to a pivot means mounted on said dipper stick at a distance from the pivotal connection of said bucket to said dipper stick not greater than the length of either said first or said second link, and at its opposite end to said first. link to form with said first link, dipper stick, and bucket, a four bar linkage rocking mechanism to pivot said bucket on said dipper stick, and hydraulic means pivotally connected adjacent and hydraulic means connected to said linkage and to said dipper stick, said hydraulic means being of such length that the digging edge of said bucket may be withdrawn beyond the plane of said dipper stick and whereby i ,when the digging edge of said bucket is in the plane of its opposite ends to said dipper stick and to said linkage for efiecting pivotal movement of said bucket relative to said dipper stick.

3. In a device of the character described, a dipper stick adapted to be pivotally connected to a boom, a bucket pivotally connected to said dipper stick adjacent one end said dipper stick.

5. The device of claim 3 including a projecting lug on said dipper stick extending from the dipper stick generally in the plane of said bucket pivoting linkage, said second link being pivotally connected to said lug on said dipper stick.

6. The device of claim 5 in which said lug extends from said dipper stick on the side of said dipper stick remote from said-linkage.

7. The device of claim 3 including a plurality of pivot points provided on said bucket for alternate connection of said first link to said bucket.

References Cited in the file of this patent v UNITED STATES PATENTS 2,191,569 

